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 The shell is thick, robust, almost circular in shape and up to 6.5 cm. The anterior hinge line curves more abruptly downwards than posterior.  The shell is dull brown, yellow, or light purplish-red in colour. Shells can be either uniformly coloured or exhibit irregular concentric zigzags on a cream background. The periostracum is dark brown and remains as a broad band around the margins of the shell, and is course and velvety to the touch. The inside of the shell is usually brown within the pallial line. The inner surface of the shell has 6-12 teeth on either side of the beak.Analaysis of dredge material revelaed that Glycymeris glycymeris is an important habitat for the hemichordate Rhabdopleura compacta (Stebbing, 1970).


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©  The Marine Biological Association of the United Kingdom

Source: Marine Life Information Network

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